Ophthalmic mounting



Filed Sep&. 28, 1928 Guam Patented Oct. 21, 1930 UNITED STATES PATENT NELSON M. BAKER, or sou'rnisnmen. MASSACHUSETTS, ASSIGNOR. "lO AMERICAN OPTICAL ooMrANY,oF sournnnrnen, MASSACHUSETTS, A voLUN'rAaY ssocIA- TION or MASSACHUSETTS orHrH LMIo MOUNTING Application filed September 28, 1928. Serial No. 309,037.

This invention relates to improvements in Ophthalmic mountings and has particular reference to improvements in ventilation of an eye protection goggle.

The principal object of the invention is to provide an improved ventilation cap for devices of this nature.

Another object of the invention is to provide a simple, inexpensive and efiicient V611".

tilation cap cupped up from one piece of material. Another object of the invention is to provide an improved ventilation cap for a device of this character made in one piece with provisions for ventilation openingsand baffles to direct the direction of the aircurrents.

Another object of the invention isto provide improved means for entrance and exhaust ventilation in an eye cup of a device of this character.

Another object of the invention is to provide improved means for connecting the eye cups so that they may be readily adjusted to various pupillary distances.

Another object of the invention is to provide improved means for directing the air currents into and out of the eye cups of a device of. this character for the proper ven ti,

lation thereof. I

Other objects andadvantages of the invention will become apparent from the following description taken in connection with the accompanying drawings and it will be apparent that many changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as expressed in the accompanying claims. I, therefore, do not wish to'be limited to theexact arrangements shown anddescribed as the preferred forms rable and lasting 1n operatlon.

only have beenshown by way of illustration.

' Referring to the drawings: a

Fig. I is a front view ofan ophthalmic Fig. III is a perspective View of the ventilation. cap, a portion of which is broken,

away;

Fig. IV is a perspective view of the eye cup rated from the eye cup; i

Fig. V is a view taken on line VV of Fig. I looking in the direction of the arrows. It has been found from experience in the use of protection goggles and the like-em bodyingclosed protective eye cups'that the and'ventilation cap showing the cap sepaventilation of the same forms-a most important feature of the device. This is par ticularly true in those cases where the pros tection goggles are used to-protect the eye OFFICE against intense heat, such as in the case of welding and the like. too'that not onlyis it necessary to' provide ventilation'openings into the eye cup but that the direction of the currents of theair play It has been found an important part and that there mustbe features determining the direction in; which the 'alr enters the eye cup and is exhausted therefrom. In the past in the attempt to provide efiicient answers to these questions separate features have been provided to take care of the various elements, for instance, the

ventilation opening in the eye cup, the ventilation opening in the ventilation cap, the

arrangement of bafilesor directional plates in connection with the opening in the cup and in the cap, the type of opening required on the temple side and the type of opening required on the nasal side of the eye cup, etc. It was found that where separate'members or features were brought together to take care of these various devices they were not only expensive to make and fit, but that there was ,a tendency of their getting loose and out of order. It is, therefore, one of the prime objects of my invention to'provide a unitary construction as far as possible to embody these various features, making the same less expensive to manufacture andmore du- In' connection with this feature I have provided means for connecting the eye cups that may be readily adjusted without detachment to the pupillary distance ofvarious wearers.

Referring to the drawings in which similar reference characters denote corresponding parts throughout, the invention comprises the pair of eye cups 1 having a contoured edge 2 t0 fit the face, a seatfor the lens 3 and a screw retainin ring); 4; holding the 'l in place on the cup. Th s eye cup I preferably male oil? ne non-heat co" ing material such as nard rubber, ba: similar composition, although for some poses they may be made of metal or other material. On the ieni ioral side oi. he eye cup I cut the ve itilation open ng;

this opening); I lit an integral 1 or cup member 6. llhis ventila ion has the flange 7 which tits the outer the eye cup 2 over the openinga, bziog secured thereto by the rivets 8 or otl holding: devices. From the fl y-d 7 there arises a cup portion 9 hav lation opening; 10 and the balile pe tending into the interior of the baffle plate 11 sides fo the optr lip into the ventilation cup to lo plate. This one cutti N form tion opening and also the will be understood th member cupped up i metal or similar mate at.

It will be noted in Fig. ll that e c tion 01 the baiile plate is outwardly in opening 5, thus causing the air coin through the opening 10 to b \vardly, then striking the interior venti .atien cup and being de'liect eye cup through the opening 5.

portion 7 of the ventilation cap 6 has opening 12 through which is assed the hose:

band 13 for holding the the face, the headband being 7 opening 12 or knotted as desired to keep from coming out of place.

On the nasal side of: the eye cup 1 is placed a series of holes or openings 14 over which is placed the bent baflle plate 15 held in place by the rivets or like fasteners 16. The two eye cups 1 are secured together by bri 1 17 preferably of ductile material having t 1e intermediate loops 18 and the depend ing portions 19 terminating in the foot 20 which is secured to the Walls of the eye cup by the rivets or the like 21.

The operation of the devic' as Air is admitted on the temporal. side the opening 10 in the ventilation cap (3, beinr, deflected. by the baflle plate 11. The exhausted through the openings 14 on nasal side, being deflected around by the baffle plate 15. The goggle is held in place on the face by means of the headband 18 which is held in the openings 12 of the ca p member 6 The bridge member 17 may be adjusted by bending through the loops 18 to increase or decrease the distance between the centers of the eye cup, thus regulating tl e papillary distance of the goggle vtor various wearers. The lens 3 is inserted in place on the end of the eye cup and the screw ring 4 screwed in place thereon to hold the lens in place.

s in place on e "red into the :L it) It will be understood that the ventilation cap one piece construction stamped or cu ped up from a thin piece of sheet metal or r material.

that the distance between .7 may be regulated Without re 1 ol parts. It Will also be seen that l siniolc, eiliicient and economidescrihed my invention, 1 claim: 1 device of the character described Lion an eye cup having an ougrh its Walls, a ventilation cap n9; a cup portion having; a slit in side oi? the cup, a portion of the slit bei sed into the cup to provide entrance air between the cut edge and the pressed a portion, the pressed in portion forming to deflect entering air towards 1 a flange surround the cup poi eion and overlying the edges lie orifice in the eye cup, and means for Q; the flan portion to the outer side he eye cup. 2. a device of the character described in combination with an eye cup having an orifice thrognrh its Walls ventilation cap comprising in one integral piece a cup portion having slit in one side of the cup, a portion oi? the slit being pressed into the cup to provide entrance for air between the cut ed and the pressed in portion, the pressed in portion forming a baffle plate to deflect the entering air towards the outer side of the cup a fiance surrounding the cup portion and over any; the edges of the orifice in the eye cup, and means tor securing the flange portion to the cute side oi the eye cup.

3. 1n device of the character described for use in connection with an eye cup having an orifice through its Walls, an integral ventilati can comprising a cup portion having a in one side of the cup a portion of said llo being pressed into the cup to provide an en air between the cut edge and NELOON M. BAKER. 

